Using a 41,000 second ROSAT PSPC image of the A2199 cluster
of galaxies, we have completed a spatial search for emission
in excess of the thermal component. The radial surface
brightness profile is well fit by the standard "Beta Model"
profile out to 2 Mpc. Making the simple assumptions that
non-thermal X-ray emission originates from Inverse Compton
scattering of relativistic electrons off of the microwave
background photons and that the magnetic field is frozen
into the intracluster medium, we have produced a non-thermal
radial profile using the radio synchrotron spectrum
parameters. This non-thermal profile diverges significantly
from the beta-model with increasing radius. The image has a
high signal-to-noise ratio over most of the cluster and
constrains the maximum allowable ratio of non-thermal to
total emission to be less than 1%. This value is normalized
to the same energy band and region as the previoulsy
reported value of 17% based on SAX observations (Kaastra et
al., 1999, ApJ, 519L, 119). We further explore more
generalized models for the radial distribution of
non-thermal emission.

This research was supported by NASA and NSF.

The author(s) of this abstract have provided an email address
for comments about the abstract:
mronqu1@umbc.edu